TY - JOUR
T1 - Preparation of SiC-based cellular substrate by pressure-pulsed chemical vapor infiltration into honeycomb-shaped paper preforms
AU - Ohzawa, Y.
AU - Nakane, K.
AU - Gupta, V.
AU - Nakajima, T.
PY - 2002/6/15
Y1 - 2002/6/15
N2 - Using a pressure-pulsed chemical vapor infiltration technique, SiC was infiltrated from a SiCl4 (4%)-CH4 (4%)-H2 gas phase into carbonized paper preforms at 1100°C. SiC-based cellular substrates with cell wall thicknesses of 25, 50 and 100 μm were obtained by using honeycomb-shaped paper preforms as the templates. The reduction of both wall thickness t and cell pitch d of SiC-based honeycomb substrate successfully led to an increase in geometric surface area per unit volume S, keeping pressure drop ΔP at constant, besides; ΔP decreased without lowering S by the reduction of t and the increase in d. The pressure drop in the prepared honeycomb substrates depended on S2α-3 value, where α was open frontal area fraction. The compressive strength of the honeycomb substrates with t of 25 μm was about 7 MPa. The strength increased in proportion with 1 - α, which corresponded to the volume fraction of the cell wall in the honeycomb substrate.
AB - Using a pressure-pulsed chemical vapor infiltration technique, SiC was infiltrated from a SiCl4 (4%)-CH4 (4%)-H2 gas phase into carbonized paper preforms at 1100°C. SiC-based cellular substrates with cell wall thicknesses of 25, 50 and 100 μm were obtained by using honeycomb-shaped paper preforms as the templates. The reduction of both wall thickness t and cell pitch d of SiC-based honeycomb substrate successfully led to an increase in geometric surface area per unit volume S, keeping pressure drop ΔP at constant, besides; ΔP decreased without lowering S by the reduction of t and the increase in d. The pressure drop in the prepared honeycomb substrates depended on S2α-3 value, where α was open frontal area fraction. The compressive strength of the honeycomb substrates with t of 25 μm was about 7 MPa. The strength increased in proportion with 1 - α, which corresponded to the volume fraction of the cell wall in the honeycomb substrate.
UR - http://www.scopus.com/inward/record.url?scp=0037096855&partnerID=8YFLogxK
U2 - 10.1023/A:1015410816924
DO - 10.1023/A:1015410816924
M3 - Article
AN - SCOPUS:0037096855
SN - 0022-2461
VL - 37
SP - 2413
EP - 2419
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 12
ER -